I have always been fascinated by Churchill and have read quite a bit about him. Overall, I thought this movie was a very good portrayal of the defining moment of an extraordinary life. The vast majority of the elite in England was firmly against Churchill wanting to fight and they were very close to surrender. Most British historians will admit that the powerful in the country were only concerned with remaining powerful and wealthy with little thought of the British people.
I believe this to be the main reason Hitler did not attempt to invade England in the early days - he thought they would surrender.
One man stood in the way - Winston, the portrait of resolute conviction. He was a horrid military tactician, but he was certainly the right man at the right time for all of us.
You might like the website Chartwell books in NYC. They have all things Churchill.